Bucket-dump trip mechanism



Mar. 3, 1925. 1,528,189

. G. W. FROST BUCKET DUMP TRIP MECHANISM Filed Jan. 27, 1923 5 Sheets-Sheet l G. w. FROST BUCKET DUMP TRIP MECHANISM Mar. 3, 1925. f 1,528,189

Mar. 3, 1925.

G. W. FROST BUCKET DUMP TRIP MECHANISM Filed Jan. 27,1923 "5 Sheets-Sheet s I/W w 0W a J Mar. 3, 1925.

1,528,189 G. W. FROST BUCKET DUMP TRIP MECHANISM Filed Jan. 27, 1923 5 SheetS-Shegt 4 Mar. 3, 1925. 1,528,189 G. W. FROST I BUCKET DUMP TRIP MECHANISM Filed Jan. 27, 1925 5 Shets-Sheet 5 WITNE3$ Patented Mar. 3, 1925.

UNITED STATES 1,528,189 PATENT OFFICE.

GEORGE W. FROST, F MILWAUKEE, WISCONSIN, ASSIGNOR TO KOEHRING COMPANY OF MILWAUKEE, WISCONSIN, A. CORPORATION.

BUCKET-DUMP TRIP MECHANISM.

Application filed .Tanuary 27, 1923. Serial No. 615,192.

- T 0 all whom it may concern:

Be it known that I. Gnoncn W. Fnos'r. a

citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Viscous-in, have-invented certain new and useful, Improvements in Bucket- Dump Trip Mechanism, of which the following is a specification. 1

The invention hereofcomprlses certain improvements in the construction of bucket controlling" mechanism including dumping and restoring instrumentalities, for distributing buckets such as utilized in conjunction: with what are known as concrete pavers, or paving machines, in common use today.

Letters Patent showing a typical construction embodying the general basic features .of that hereinafter set forth, are No. 1,141,470, issued June 1',1915, to E. H. Lichtenberg.

Among the novel features of-the present bucket dumping and restoring devices, are

the following provisions: v

' An arrangement and co-operation of parts intended to impart tothe door or doors of the bucket a perpendicular movement when the trolley which carries the bucket is moved in either of opposite directions, and in a manner which is controllable by the operator of the machine. A novel form of 30 shuttle or trip mechanism which is carried by the supporting trolley of the bucket. Peculiar door releasing and restoring or clot ing features included in the last mentioned mechanism. A special form of trolley construction per se, and novel operative connections between the door releasing and restorin; instrumentalities. and the door itself.

In the accompanying drawings;

' Figure 1 is a side view of bucket mechanism carried by a boom such as used on a paving machine, certain parts including primarily the tripping dog, and the door restoring member being shown in dotted.

lines in position indicative of range of movement.

Figure 2 is a front view of the bucket mechanism of Fig. 1, the boom being'illustrated in section.

Figure 3 is a view of door dumping and releasing mechanism somewhat like that illustrated in Figures 1 and 2, but mounted upon a somewhat different construction of trolley.

Figure 4 is a sectional view showing more particularly the mechanism of Fig. 3.

Figure 5 is a cross sectional view showing more clearly the mounting of the stops which limit the movement of the trolley in the direction of the mixer and efiect closing frame work of a concrete mixer, and is susceptible of being adjusted vertically at different inclinations in relation to the frame, as well as of being swung horizontally to cover a relatively wide area of distribution, in dumping the concrete upon the subgra'dc with a distributing action. On this boom A which usually comprises spaced connected channels, there is attached a cam 1 which functions in controlling the action of a certain trip member by which the door holding member may be released, said ca'm also including a feature in the form of a stop or engaging member, WlllCll functions in co-operation with the door closing member to control the latter. The cam 1 may be attached to the boom A in any suitable manner.

- The trolley B supports the bucket C by means of hangers 2. said trolley or carriage B is equipped with ways or guides 3, in which slides a shuttle or knock-ofi' member 4. On the shuttle 4 at its outer or left hand end ispivoted a trip dog 5, the said dog adapted at its upper end to engage the cam 1, and when so engaged the lower end or tail 5 thereof is held upraised and clear of the door holding. and. locking member 6.

. The member 6 consists of a shaft transverse to the trolley, equipped with rollers 7 upon its ends, and passing thru the upper end of a. yoke bar 8. The yoke bar 8 is connected with a yoke 9 which is sufiiciently broad in its span thatits sides receive therebetween the bucket C. The sides of the yoke 9 are connected at their lowerextremities, as at 10, with the door 11 of the bucket C, and the degree of opening movement of thedoor 6 is so disposed that its rollers 7 are received in aseat 14, this adjustment maintaining,-

the door 11 locked closed.

For knocking ofi' the member 6 to trip or throw the same from its seat position aforesaid, the trip dog 5 is employed. Normally, when the bucket C is in its receiving or charging position adjacent to the mixer, the dog 5 is inoperative to act upon the holding member 6, because the cam 1- maintains the tail or lower end of the dog 5 above the plane of the member 6. When, however, the trolley B and the memberC are moved outwards on the'booni A, the upper end of the dog 5 passes from beneath the cam 1, and the tail of the dog 5 lowers in front of the member 6. The moving cable 15 for the trolley B is attached to the shuttle member 4, and afterthis cable has been operated by a suitable clutch mechanism, in an outward direction, the shuttle 4 which has a free sliding movement on the trolley in the guides 3, for a few inches, engages with a. stop 16, and the abutment between the parts 4 and16 causes the trolley to move outwards until the bucket has reached a point where it is 'desired to dump it. Thereupon the cable or pull-rope 15 is reversed, and as the dog 5 has moved so that its tail is in-front of the member-6, reversal of the movement of the cable 15 initially aictuatesthe shuttle 4 to cause impingement of the dog 5 with the member 6, unseat the latter from the seat 14, and cause it to move downwards in depending guides 17 that project downwards from the.

carriage or trolley B. The door 11 is caused to open in the above operation thru th downward movement of the yoke 9, which is supported by the member 6 and its yoke bar 8. The degree of opening moigement of the door is determined by the co-operation of the parts 12 and. 13.

I On reference to Fig. 1 especially, it will be noted that the holding or locking member 6 by which the door is maintained in its closed position, has connected thereto a restoring device which preferably comprises spaced hook links 18. pivotal connection with the member 6, at the lower ends of the links, the member 6 by its shaft format-ion constituting the .pivot itself, as well as a shaft on which the rollers 7 are mounted. Normally when the bucket door 1], is closed, the links 18 occupy approximately horizontal positions, as shown in Fig.

1, in dotted lines, the curvedupper extremi-' ties or hook portions of the links being con- These links 11 ave nected together by a bolt '01 impingement member- 19. -.lhe member 19 is capableof engaging stops 20 on the boom A adjacent to the cam 1, when the bucket C and the trolley B are brought back by ac'ti'on of the cable 15, to the mixer to be recharged.

With the above general arrangement of parts and their construction set-forth, an enscribed. Assuming that in Fig. 1, the door 11 is closed, the holding member 6 is at its upper seating or locking position, and the.

restoring orfdoor closing device 18 is engaged with the stops 20, with the dog 5 cooperating with the cam-1,'we have the parts in their positions as when the bucket is lo.-. cated at the mixer. ready to be charged, or-

already charged with a batch of concrete to 4 released from the cam 1, and its tail drops in front of the member 6. At the point where the bucket is to be opened, in its length of travel on the boom A, the operator tire operation, of the machine will be dethrows in the clutch mechanism for'reversho ding member 6, which slides down in the guides l7,'and the door 11 is thus opened as an initial action involving reverse movement of the shuttle 4 and sliding movement of the shuttle relatively of the trolley B. The action of the shuttle 4 in moving the dog 5 to knock ofi the member 6 for dui'nping the bucket is veryquick, and then the shuttle 4 while the bucket is open, the clutch mechanism controlling the cable may again be reversed to shift the bucket outwardlyalong the boom in a direction of movement of'it-s dumping position as the shuttle 4 will-efi'ectively co-operate with the stop 16 under such conditions. This enables a distribution of concrete over the same area on which it'has been previously deposited. and thereafter the cable may be reversed a third time to carry the bucket back to the machine. versing action of the cable may take place several times to impart to thebucket C a ing the cable 15, the dog 5 knocks off the I Or the repull on the links 17 in the door closing or.

back and forth or sort of reciprocating distributing action. However, when the bucket is empty, and it is desired to move it back to its charging position, the inhaul on the cable 15 is completed with the shuttle 4 acting against the sto 21 until the bucket reaches the mixer, at W ich time the restoring device comprising the links 18 and part 19 will have been engaged with the steps 20. and the holding or locking member 6 will have been raised and reseated in the seat 7 by the up restoring action. Then the trolley B reaches the limit of its inhaul movement, the dog ,5 will have been engaged again with the cam 1-, and the tail of the dog will be lifted clear of the member 6, rendering the dumping mechanism inactive while the bucket is at its charging position.

In Figures 3 and 4 of the drawings, a

slightly modified adaptation of the inven-' tion is employed wherein parts largely equivalent to those previously set forth will be noted. It may be observed that the cam l in Fig. 3 is somewhat differently shaped from the cam 1 previouy set forth, though functioning largely the same. However, in

Figs. 3 and 4, it is notable that the stops 20 are cushioned by a spring 20", and'the outward projection of the stops 20 fromthe part in which it is mounted, is limited'by a pin and slot connect-ion shown at 20. Otherwise, the general construction of parts is about the same as set-forth, the mounting ber 6 and yoke 9, the same tending to resiliently hold the locking member 6 seated by 1 a resilient action while the door is closed.

The trolley B will be seen. to comprise a main body portion equipped with the rollers 25 and a rocking section composed of pivoted arms 26 to the ends of which are journaled the rollers 27. The rear portion of the trolley B, or that nearer the mixer is extended or canted in the direction of the mixer, being projected quite a little distance beyond the hangers 2 so that the trolley may move sufiiciently toward the inner extremity of the boom to bring the bucket C well beneath the discharge chute of the mixer, or any suitable chute by which the concrete is to be supplied to the bucket.

' Owing to the pivotal mounting of the rollers 27 on the arms 26, and the composite construction of the trolley B, the load in the bucket C is distributed over a wide working area in respect to the draft on the boom. The arms 26 in other words are equalizing arms which automatically adjust themselves to distribute the load pressure of the bucket O and its contents, in relation to the boom, the wheels 27 working in conjunction with the wheels.25 to the above end. At times the bucket C is not loaded with .absolute accurapiy of gravity whenloa ed is concerned, and

due to this variation the equalizing trolley' construction is of advantage.

The stops 20are providedfbne on each of. the channels which comprise the the stops may or may not be a part of the cam 1, as desired. Preferably, however,

one of the stops 20 is integral with the cam 1. The front end of the trolley B carries an adjustable abutment in the form of bolts 28 equipped with suitable clamping nuts 29, the head of which bolts may be adjusted so as to properly adjust rollers 19 01 19, in respect to the seat 7'.

Also it is 'notable in reference to the bucket door 11, that-the sides of the yoke 9 have a sort of loose connection with the door, as seen best at 10, and the door is hinged to a bracket 1O on the. bucket C at a point somewhat between the front and rear edges of the door. This construction enables the bucket to center itself in closing in relation to the bucket opening.

The stop 21 has a combination function in that itlimits the. movement of the shuttle 4 in one direction, and is formed with shouL ders 21 that act as spacing means between the sides of the carriage B. A tie bolt 21".

passes thru the stop and spacer member 21. The stop means 16 really consist of vertical ribs at the outer ends of the little guidewaysor slots 3 which are formed in the inner sides of the trolley B. The wider portions of the shuttle, as seen best in Fig. 6 are adapted to abut with the stop means 16 in an obvious manner, the shuttle 4 having an outwardly extending lug or arm to which the dog 5 is pivoted. The ends of the cable 15 are attached to the shuttle by a clamp plate 4' mounted on the shuttle, said ends of the cable being passed thru suitable openings and disposedin opposite directions on the body ofthe shuttle. The method of attaching the ends of the cable to the shuttle is not very material, because some other convenient method might be used. However, the construction employed accommodates for taking up slack in the cable when necessary, and is a good working construction in practice. The under side of the plate 4 may be serrated or roughened to so far as its center I boom A, as seen best in Fig. 5, and one of grip the cable ends more firiry, and Figures 6 to 8 inclusive, show the arrangement just set forth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In combination, a boom, a trolley mounted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the trolley seat, means operable .to knock the locking member oil the said seat. to release the door, a restoring link connected to the door locking member, and trip means cooperating with the restoring link to close the door as an incident to the movement of the trolley on the boom.

2. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the seatof the trolley, means operable to knock the locking member off of the seat to release the door, a hooked restoring link pivotally connected to the door locking member, and trip means cooperating therewith to automatically close the door as an incident to the movement of the trolley on the boom.

3. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the trolley seat, means operable to knock the locking member ofl' said seat to release the door, the last means including a shuttle movablerelatively to the trolley.

l. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by thetrolley and comprising a door, a door locking member connected with. the door and normally supported in the trolley seat, means operable to knock the locking member of? said seat to release the door, and guides for receiving and limiting the movement of the locking member when knocked off its seat.

5. In combination, boom, a troll y adapted to travel thereon and formed with a seat, a dumpir bucket, supported by @151 trolley and comprising door, cable means for moving the trolley back and forth on the boom, a door locking member connected with the door and normall supported in the seat of the trolley, a shuttle connected to the cable and having alimited sliding movement relative to the trolley, said trol ley being provided with stop means to engage the shuttle at both limits of its move ment, and means actuated by the shuttle for knocking the locking member oil of the 'seat to release-the door.

6. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the trolley seat, means to co-act with the locking member to shift it from its seat enabling door opening action of the bucket, an instrument-ality for pulling the locking member back on to its seat, and means on the boom to engage and operate said instrumentality.

7. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking mem-' ber connected with the door and normally supported in the trolley seat, means to co-act with the locking member to shift it from its seat enabling door opening action of the bucket, an instrumentality for pulling the locking member back on to its seat, and a cablefor moving the bucket and instrumentalities associated with the cable by which the actuating devicesctor the locking memher are operated through action of the cable to both shift the latter from and to its seat.

8. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the trolley seat, means to co-act with the locking member to shift it from its seat enabling door opening action of the bucket, a pulling device on the trolley connected to the door of the bucket to restore it to closed position, and a stationary member carried by the boom to engage the pulling device and cause it to effectsaid door closing action,

9. In combination, boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in. the trolley seat, means to co-actwith the locking member to shift it from its seat enabling door opening action of the bucket, a pulling device on the trolley connccted to the door of the bucket to restore it to closed position, and l stationary member carried by the boom to engage the pulling device and cause it to effect said door closing action, said stationary member comprising a cushion.

10. In combination, a boom, a. trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported. in the trolley seat, means operable to knock the locking member oft said loo llu

seat to release the door, and a yoke spanning the bucket at opposite sides and forming the connection between the locking member and the door.

11. In combination, a boom, a trolley adapted to travel thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a door locking member connected with the door and normally supported in the trolley seat, means to coact with the locking member to shift it -from its seat enabling door opening action of the bucket, a yoke spanning the bucket at opposite sides and forming the connection between the locking member and door, a door closing device connected to said yoke, and means to operate the closing device when the trolley reaches a certain position on the boom.

12. In combination, a boom, a trolley mounted to travel back and forth thereon and having a seat, a dumping bucket supported by the trolley and comprising a door, a cable for moving the trolley, a door looking member connected with the door and normally supported in the seat of the trolley, a shuttle member connected to the cable and having a limited movement relative to the trolley, stop means on the trolley for engaging the shuttle at both limits of its said movement, means actuated by the shuttle for knocking the lockin member oil of the seat of the trolley to release the door, a restoring element connected to the door locking member, and trip means cooperating with the restoring element to close the door as an incident to the movement of the trolley on the boom.

13. In combination, a boom, ranged to travel thereon, a bucket supported by the trolley and comprising an openable door, a yoke spanning the bucket and hava trolley aring its sides connected with said door, trip ping mechanism on the trolley connected with the yoke to control 0 ening movement of the door, and adjustab e sto means in.- termcdiate the sides of the hue cet and the sides of the yoke for determining the extent of opening of the door.

14. In combination, a boom, ranged to travel thereon, a bucket supported by the trolley and comprising an openable door, a yoke spanningthe bucket and having its sides connected with said door, a locking member for holdim' thcyoke and door in door closing position, the trolley having a seat to receive said locking member and maintain it in its door closing position, a shuttle on the trolley, means intera trolley armediate the shuttle and the locking member for knocking the latter ofi its seat toopen the door, and a restoring device for closing the door, including links connected with the locking member, and formed with hook ends, together with a stationary part to cooperate with the hook ends of the links to upraise the latter when the trolley reaches a certain position on the boom whereby to close the door.

15. In combination, a boom, a trolley. arranged to travel thereon, a bucket supported by the trolley and comprising an openable door. a yoke spanning the bucket and having its sides connected with said door, a locking member for holding the yoke and door in door closing position, the trolley having a seat to receive said locking member and maintain it in its door closing position, a shuttle on the trolley, means intermediate the shuttle and the locking member for knocking the latter of]? its seat to open the door, and a restoring device for closing the door, including links connected with the locking member, and formed with hook ends, together with a stationary part to 00-01)- erate with the hook ends of the links to upraise the latter when the trolley reaches a certain position on the boom whereby to close the door, the trolley being equipped with guides at opposite sides thereof, and the locking member having rollers to en age and operate in said guides to guide the door opening movement of the locking member when unseated and when being seated.

16. In combination, a boom, a trolley, bucket on the trolley having a dumping door, a yoke receiving the bucket between its sides and having the lower ends of its sides connected to the door, and tripping mechanism on the trolley to open and close the 100 door through operation of the yoke, the tripping mechanism including a resilient connection between one of its parts and the said yoke.

17. In combination, a boom, a trolley, a 105 bucket on the trolley having a dumping door, door closing means including members at opposite sides of the bucket, and tripping mechanism on the trolley connected with the said members to close the door, 110 and operable to open the door, and sprin means intermediate the said members an the tripping mechanism providing a resilient action for maintaining the door closed substantially as set forth.

In testimony whereof I ailix my signature.

GEORGE W. FROST. 

